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Relationship of QST measures between low back and leg sites in people with radicular leg pain

  • Background and Aims Clinicians and researchers often rely on altered neurological integrity tests in the leg to identify radicular pain, however neurological integrity is often not tested in the low back region even in the presence of pain in this region. There have been suggestions that the low back pain itself could be neuropathic in nature in some patients (Baron et al., 2016). This study aims to explore the relationship between quantitative sensory testing (QST) measures in the leg and low back in participants with radicular leg pain to consider if sensory testing should be performed in both areas in clinical practice. Methods 13 participants (mean age 48.2 SD 13.8, gender (female) 8) with radicular leg pain were recruited from National Health Service spinal clinics in the UK. After assessment with the clinician, a full QST profile was taken from each participant’s affected leg and low back. Z scores were calculated using data from age matched healthy controls. Correlations using Pearson’s if the data was normally distributed or Kendall’s Tau-b if not, were undertaken between QST scores of the low back and leg. Paired t tests or Mann Whitney tests were performed to assess differences in QST scores between the leg and low back regions. Results There were no significant correlations (P>0.05) in any of the QST measures between the leg and the low back regions. However, only vibration detection threshold measures showed statistically significant differences between the leg and low back (p<0.001), with the low back region showing greater loss of function (mean -2.84) than the leg (mean -0.61). Conclusions Significantly lower vibration thresholds were found in the back compared to the leg. This may suggest some alteration in posterior primary ramus large diameter afferent nerve function, and indicate that the low back pain itself may indeed have a neuropathic component. Our findings suggest that sensory testing of the lumbar spine may be advisable in this group of individuals. The small sample size means that these results must be taken with some caution, however these results warrant further investigation in people with radicular leg pain.

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Metadaten
Author:Colette Ridehalgh, Brigitte Tampin, Annina Schmid
Title (English):Relationship of QST measures between low back and leg sites in people with radicular leg pain
URN:urn:nbn:de:bsz:959-opus-13841
Document Type:Other
Language:English
Year of Completion:2019
Release Date:2019/06/26
Faculties:Fakultät WiSo
DDC classes:600 Technik, Medizin, angewandte Wissenschaften / 610 Medizin, Gesundheit
Review Status:Akzeptierte Fassung